merchant

commit 8aa4fb4cee2252ceb23f85255b5da1a235bb3827
parent cd8cf7177a78910fe6c611de275fc186fd8fde73
Author: Marcello Stanisci <marcello.stanisci@inria.fr>
Date:   Fri, 22 Jul 2016 18:59:05 +0200

adding initial logic to parse articles and
annotate which images should be served with them

Diffstat:
A
examples/blog/articles/.gitignore
 | 
1
+
A
examples/blog/articles/article_images.php
 | 
41
+++++++++++++++++++++++++++++++++++++++++

2 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/examples/blog/articles/.gitignore b/examples/blog/articles/.gitignore
@@ -0,0 +1 @@
+articles_images.json
diff --git a/examples/blog/articles/article_images.php b/examples/blog/articles/article_images.php
@@ -0,0 +1,41 @@
+<?php
+  /**
+   * Parse $html_filename and add an entry of the type
+   * "$html_filename" => ("img1.png", "img2.png") for each
+   * encountered 'img' tag having the 'src' attribute formatted
+   * as "/essay/<article_slug>/data/img1.png", to the JSON which
+   * associates any article with its images
+   */
+  function add_article($html_filename){
+    $doc = new DOMDocument(); 
+    $doc->loadHTMLFile($html_filename);
+    $xpath = new DOMXPath($doc);
+    $xpath->registerNamespace('php', 'http://php.net/xpath');
+    $xpath->registerPhpFunctions('preg_match');
+    $elements = $xpath->query('//img[php:functionString("preg_match", "@^/essay/[^/]+/data/[^/]+@", @src) > 0]');
+    /*
+    1 open final JSON in "append mode"
+    2 append current file's entries
+    */
+    $db_filename = "articles_images.json";
+    $json_str;
+    if (file_exists($db_filename))
+      $json_str = file_get_contents($db_filename);
+    else
+      $json_str = "";
+    $json_db = json_decode($json_str);
+    $json_db->$html_filename = array();
+    foreach($elements as $img){
+      $value = $img->getAttributeNode("src")->value;
+      array_push($json_db->$html_filename, basename($value));
+    }
+    file_put_contents($db_filename, json_encode($json_db));
+  }
+
+  /* suppress warnings due to parsing HTML5 */
+  libxml_use_internal_errors(true);
+
+  /* main: manually call add_article() for each article */
+  add_article("scrap1_10.html");
+  add_article("scrap1_11.html");
+?>